Help- Cannot remove a tire with a Coats tire machine

[haanzel]

I have a Coats 5060 and the tire is a 265/75 R16, so it's a bit bigger than a car tire. With the top bead off and the tire angled with the high side on the left, I put the lever under the bottom bead below the duck head but when I do, it is impossible to push down on the high side and lift up on the low side/lever to bring the duckhead side up.

This sounds basic I know and I have watched lots of videos but I cannot get the tire to come up to remove the bottom bead. What is the trick to remove SUV tires like this? I was able to do a smaller 235/75R15 with no issue.

 

[RacerX]

Have you tried flipping the rim over and trying it that way?

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[haanzel]

Have you tried flipping the rim over and trying it that way?

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You mean put the top bead back on and then flipping it? No, but I think I would still have the same issue.

 

[930dreamer]

Just flip and see if the bottom bead will break.

 

[haanzel]

Let me clarify, the beads are broken top and bottom. Where I am having problems is the action at 3:14-3:23 in this video

I cannot lift the tire up, guessing the sidewall is too thick?

 

[WillRead]

Do you have the bottom bead in the drop center?

 

[Git]

Keep in mind the 'drop center' is not always in the center of the wheel. Your tires may only go on/off one way (Reverse mount wheels come off the back)

Also, I have a manual operated tire changer that I use for my motorcycle tires. They have extremely stiff sidewalls and the only way to get them off/on is to actually use little wooden blocks to hold the bead in the drop center (center of wheel) and then I have to actually use a ratchet strap to pull it in close to the rim

 

[ex-x-fire]

Lube the heck out of it.

 

[haanzel]

Thanks! That pic definitely helped. No, the tire is at the bottom where the blue green red lines are. I will raise the bottom bead up and then try it.

 

[haanzel]

Also, I just have the standard duckhead, if there are other attachments that make mounting/dismounting easier, I'd like to hear what those are.

 

[colin39]

Is it a rav4 as these have a debeed system that will make ya life hell

https://www.toyotaownersclub.com/forums/topic/117342-changing-run-flat-tyres/

 

[haanzel]

No run flats, just a suv tire.

 

[colin39]

Just need to punch it fully of the beeds then

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[joecon]

Did you use lube on the beads? Can you get the bead over the rim? Is the offside of the tire set right, not to low or to high? I had the same tire machine and did not have problems with this size.

 

[haanzel]

Circling back on this. I stepped away out of frustration/time and this past month decided to look into it again. There were a few things that needed to be done.

1- check for leaks with soap and fix them at the connections. One leak was the rotary coupling so I got a new Coats Tire Changer Rotary Coupling kit and swapped it in
2- ordered a table cylinder seal kit and rebuilt the cylinder. This is the cylinder that clamps.
3- I noticed the air lines to the table were pinched off on 2-3 of them. They were a bit short too by about 2-3" which caused them to bend. I got some 3/8" nylon tube and replaced all 6 lines, This made a huge difference

I successfully removed a number of tires from smaller ones to 35s. I am really happy to have this working now, and it worked well even with my small 20 gallon air compressor.

Now for the question. I did have a few tires rip on the inside of the edge by the duckhead. These were longer strips that ate a chunk of the tire. What causes this? The duckhead is metal and I assume OEM, but I am debating if a new duckhead would fix this. https://www.amazon.com/dp/B000I1FDU8/?tag=atomicindus08-20 When do you know you need a new duckhead?

Thanks all.

 

[toplessHO]

as tires age they loose elasticity
how old were the tires that ripped?
Also Lube lube lube

 

[haanzel]

Not recent, anywhere from 2015 back to 2001.